AirPlayit is a free software that turns your computer to a stream media server, it streams video and audio files, other devices can use web browser to access your shared folders, play video and music in real time. You can set up local network or remote connection, but before that you have to set up several options. For most users, it should be a little bit difficult. But for geeks, it isn't a big problem.

Why do you have to use this software? If you have other devices, like iPad, iPod, smart phones, tablets, even internet TV, you can share media files in real time, you don't have to copy music and video files by machine to machine. AirPlayit supports Windows and Mac Operation System.